Coecobrya sirindhornae sp. n. A–D Habitus E–F Two morphological types of cave Coecobrya in Thailand E Coecobrya phanthuratensis Zhang & Jantarit, 2018; normal form with short antennae, appendages and small size F Coecobrya polychaeta Zhang & Nilsai, 2017; troglomorphic form with long antennae and appendages with large body size and G Coecobrya sirindhornae sp. n., highly troglomorphic characters with extremely long antennae and appendages and also large body size.